Who called from 2012548826

They told me that a cream to relieve pain had been approved for me and
that a doctor would call. They said they were from R/X services.

Called 2/3/16 at noon. No name. Did not answer, left no message.

Scam

They call me everyday; usually more than twice.  No clue who they are.

Calling me 4 or more times a day trying to sell  a medical cream. Phone number registered to Gareth Giesler Fair Lawn, New Jersey. How do I get this stopped?